Multiple source material distributing system

ABSTRACT

Method and apparatus for distributing material from a plurality of sources to a plurality of stations via a conveyor which connects at least one of these stations to each of the sources, the disclosed in conjunction with the selection by a variety of types of switches of a desired number of the stations to be fed by the sources, respectively, in such a manner that only one source can be used at a time to feed a given station.

United States Patent Wise 451 Mar. 14, 1972 [5 MULTIPLE SOURCE MATERIAL References Ciled DISTRIBUTENG SYSTEM UNITED STATES PATENTS [721 wise Dallas No 111,615 .2/1s71 Crampton ..302/13 [73] Assignee: Fiber Controls Corporation, Gastonia, 1,724,309 8/1929 Pigott ..302/28 N.C. 2,140,128 12/1938 Craggs ..302/28 2,774,516 12/1956 Jensen ...302/284 [22] 1970 3,414,330 12/1968 Trutzschler ..302/28 [21] Appl. No.: 5,981

Primary ExaminerEvon C. Blunk Related Application Data Assistant Examiner-W. Scott Carson [63] Continuation of Ser. No. 694,268, Dec. 28, 1967, Ammekcushman' Darby Cushma" abandoned, Continuation-impart of Ser. No. 538,437, Mar 3, 1966, abandoned, Continuation-impart of Ser, [57] ABSTRACT N 444,835 Mal 1965, abandoned, Continuation Method and apparatus for distributing material from a plurali- -P of N J 15, 1962, abanty of sources to a plurality of stations via a conveyor which dolled, commuatlon'mpalt of 561575, June connects at least one of these stations to each of the sources, 1966 abandonedthe disclosed in conjunction with the selection by a variety of types of switches of a desired number of the statio ns to lle 52 11.5. C1 ..302/27, 19/105, 302/28 f d by the sources, respectively, in Such a mafia-Ema, (my [51] Int-Cl 53/o4,B65g53/36 one source can be used at a time to feed a given station. [58] FieldofSearch ..19/105, 105 CF;

302/1 1 13 27 23 39 42 41 43 Claims, 12 Drawing Figures /M4 Jo i/6g 1 fifl g /Ai (K k wef l l I Patented March 14, 1972 ll Sheets-Sheet 1 N AW RN m

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Patented March 14, 1972 ll Sheets-Sheet 2 INVENTOR {27/1 6 M55 L|mq21a510n 2 5 ATTORNEYS Patented March 14, 1972 ll Sheets-Sheet 5 #IMM y m u k I IIIWLZ W A H W M W a f w i W. Um .m a W U: in WWW J M C U .WM 5 5 1% C37 2 5 ii Q wrlilill W w 2 W T/ 5% 1.2

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Patented March 14, 1972 3,649,082

11 Sheets-Sheet 4 05 L. L-Wiz [/2 2/? INVENTOR ZZZ/4 i W54 a ATTORNEYS Patented March 14, 1972 /312 aeqwn 11 Sheets-Sheet 5 Patented March 14, 1972 ll Sheets-Sheet 8 ATTORNEYS Patented Mmh 14, 1912 3,649,082

11 Sheets-Sheet 9 INVENTOR I 53/1 M65 F7 fl BY MW M Q4 M% ATTQRNEYS Patented March 14, 1972 3,649,082

11 Sheets-Sheet 1O ILZIZSQIO 4/ v ix ATTORNEYS Patented March 14, 1972 3,649,082

11 Sheets-Sheet 11 /JIZ MULTIPLE SOURCE MATERIAL DISTRIBUTING SYSTEM This application is a streamline continuation of application, Ser. No. 694,268, filed Dec. 28, 1967, now abandoned, which is a continuation in part of application Ser. No. 538,437 filed on Mar. 3, 1966, now abandoned; of application, Ser. No. 444,885, filed on Mar. 2, 1965, now abandoned; of application, Ser. No. 217,154 filed on Aug. 15, 1962, now abandoned; and also of application, Ser. No. 561,575 filed June 29, 1966, which is also now abandoned.

This invention relates to a distributor system, and more particularly to the electrical control system in a system for distributing material, for example, of the type that may be conveyed by a stream of fluid, such as air, to any one ofa plurality of stations that demands material. Specifically, the invention relates to feeding from a plurality of sources generally concurrently and variably to different stations according to which source is selected to feed which station or stations.

The type of material with which this invention may conveniently be employed is such as may be found in textile mills, for example, any type of fibers or fibrous material such as cotton, rayon and dacron; but no limitation to such materials is intended. Any other material which is desired to be distributed by the system could be conveniently done. And any material which can be conveyed by a stream of fluid, such as air, may also be conveniently distributed by this type of system. Basically, however, this invention is not limited to a vacuum or other type fluid conveyor.

In textile mills, for example, there are many instances in which it is deemed necessary to convey fibers from one processing system to another, and this is generally accomplished by entraining the fibers in an air stream. In order to separate the fibers from the air stream at the point of delivery, a distributor transition valve apparatus conveniently termed a fiber condensor is employed. A condenser of this general type is described and claimed in the Lytton et al. US. Pat. No. 3,039,149. A plurality of such condensers or of other types of material separators or distributors may be disposed at respective receiving points or stations where it is desired to distribute the fibers in accordance with the needs of a particular station. In such a condenser or distributor transition valve, there is an air intake channel and a discharge channel, along with a fiber outlet to a hopper, or the like, at the respective station, and a transition valve for extracting the air and material from the intake channel and separating them to the air discharge channel and fiber outlet respectively when the particular station requires material. The inlet and discharge channels of each of the distributors are connected to an air system, and the arrangement is such that if the valve is not actuated, the material in the stream of air, as it arrives at the actuated station, passes that station and proceeds to the next. Each station includes a means for sensing the material requirements of that station, and each station may be sequentially and selectively coupled to an electrical system which actuates the transition valve of the respective station or not in accordance with the instantaneous determination of the sensing system required therein. The operation of one type of transition valve is discussed in connection with FIG. 5.

This invention is a particular improvement over the invention disclosed in the Wise application, Ser. No. 538,437 which discloses and claims the system as described in the above paragraphs. The system which is disclosed and claimed in the application improves the versatility of the distributing system as described below.

In all systems prior to the present invention, only one material supply source has been used. In such a distributing system, one supply source would feed the respective stations thereof, but the use of only one supply source was restrictive in the industry.

The system disclosed by this invention allows a distributing system to use two or more material sources, whether the sources are close or quite remote relative to each other. In any event, the material from the sources can be distributed to a number of preselected stations connected to the distributing line. The material sources are connected in such a manner that both can distribute their respective materials concurrently to those preselected stations which are demanding material from the respective sources, with any one station being fed at any one time by just one source. According to the invention, the material can be distributed not only according to the demand of each station but also to a number of stations demanding a particular material from the respective supply source which contains that material. The system displays a versatility which heretofore was unavailable in the industry.

It will also be apparent hereinbelow that the system can perform automatically the selection of a predetermined number of stations which are to be fed from the respective material sources so that only one material source is selected to feed any given station.

It is accordingly the primary object of this invention to distribute material from more than one material source to a selected respective number of different receiving stations.

Another object of this invention in conjunction with the foregoing object, is to convey material from concurrently two different sources, which may or may not supply the same type or kind of material to the stations with any one station being fed by just one source.

Another and still further object of the invention is to render additional versatility of a distributing system thereby improving the quantity and quality of the distribution operation which was heretofore unavailable in the industry.

A still further object of the invention is to allow the preselection of a number of stations along a distributing line to be performed automatically.

These and other objects of the present invention will become more apparent during the course of the following detailed description and appended claims.

The invention may best be understood with reference to the accompanying drawings, in which:

FIG. 1 is a schematic and diagrammatic illustration of a system which selectively and sequentially feeds material from one source material;

FIG. 2, consisting of FIGS. 2A, 2B and 2C, is a schematic illustration of the subject invention wherein material from two sources is distributed to a number of stations;

FIG. 3, consisting of FIGS. 3A and 3B, is a schematic illustration of another embodiment of the electrical control system of this invention for distributing material from two sources to a number of stations;

FIG. 4 is a schematic illustration of another embodiment of the electrical control system of this invention for distributing material from two sources to a number of stations wherein the source which feeds each station can be changed by changing the position of a ganged switch.

FIG. 5 is a schematic illustration of another embodiment of the electrical control system of this invention for distributing material from two sources to a number of stations wherein some of the stations are adapted to be fed from either source; and

FIG. 6, consisting of FIGS. 6A, 6B and 6C, is a schematic illustration of another embodiment of the electrical control system of this invention for distributing material from three sources to a number of stations.

Before proceeding with a description of the electrical control system and selective distribution arrangement of the subject invention, reference is made first to the system which distributes from only one material supply source which is disclosed and claimed in the C.S. Wise application, Ser. No. 538,437 of which this is a continuation in part. This description is made so that the subject invention will be clearer and more readily understood.

Reference is now made to FIG. 1 wherein a distributing system is shown which specifically distributes material from one source to three receiving stations located at the vacuum conduit locations delineated as V,, V and V These transition valves or fiber condensers" are also indicated by numerals 10, 12, and 14. They are normally closed, but open when a demand is indicated by the receiving station at which they are located. These transition valves or fiber condensers are used to separate fibers of the material from the conveying air stream at the point of delivery. A plurality of such transition valves or condensers, or other types of material separators as shown in the Lytton et al. U.S. Pat. No. 3,039,151 and described in connection with FIG. 5, heretofore mentioned, are disposed at respective receiving points or stations where the material is to be distributed in accordance with the demand signal which is being generated from a particular station. The circuit diagram controlling these transition valves is now specifically explained.

With the system initially at rest, master control switch 16 is closed and it energizes power line 18. The pneumatic timer 20, which includes switch 22, which is normally closed, and coil 24 does not affect the operation of the system until the recycling sequence in the distribution operation as discussed infra.

Switches 26, 28, and 30, are level control switches and are located within the respective receiving stations of the distributing system. These switches 26, 28, and 30 effectively operate to generate a demand or no demand signal for their respective receiving stations. They are normally open and are closed only when the level of the material within the station indicates that the particular station is filled and no longer needs any material to fulfill its demand requirements. Assuming for the moment, that all the level control switches 26, 28 and 30 are open, indicating a demand at all the stations, line 13 is energized when switch 16 is closed. The open condition of level control switch 26, as previously assumed, indicates that the first station in the line and the furthest away from the supply source 32 is demanding material. With the energization of line 18 and switch 26 being open, line 34 is energized since switch 22 is normally closed. The power is transmitted to transition valve through lines 34, 36 since relay contact B, is normally closed. The circuit is completed through return line 38. Line 34 concurrently energizes line 40 and 47 through the normally closed relay contact D,. with the energization of line 42, coil 44 of feed timer 46 is energized. Coil 44 is a time delay type coil which becomes fully energized after a lapse of a few seconds. This circuit is also completed through line 38. The feed time closes switch 48 after a definite time delay, usually in the range of five seconds. This delay time period is interjected in the circuit to assure that material supply from source 32 is ready to be distributed.

When switch 48 closes, coil 50 is energized, which in turn closes three phase switch 52, thereby energizing motor 54 which begins the flow of material to conduits 56 and 58 from supply source 32. Transition valve 10, being open, is now capable of transmitting the received supply of material to its respective receiving station. The flow of material from supply source 32 through conduits 56 and 58 is caused by the vacuum created through fan 60. The fan 60 can be electrically connected to the primary circuit, so that when switch 22 opens, thereby closing the system, it also concurrently stops the fan; or the fan 60 can be continuously operated as shown through a separate power source and shut off only when the system is completely shut down by the opening of master control switch 16.

When the first station is filled, the level control switch 26 closes, energizing thereby coil 62 through line 64. With the energization of coil 62, relay contacts B, and D,, which are normally closed, are now opened, thereby deenergizing coil 44, opening switch 48 and stopping feed motor 54. When relay contacts B, and D, are opened, relay contacts A, and C,, which were normally opened, are now closed. The closing of relay contact A, allows power from line 34 to be transmitted to line 66 and through relay contact 8,, which is normally closed, to line 68, thereby opening transition valve 12. Concurrently, power from line 34 fiows through line 40, to normally closed relay contact D to line 70 and 42, once again energizing coil 44, thereby instituting a delay factor in the feed supply distribution. At the end of this delay period, switch 48 is closed in turn closing three phase switch 52, energizing motor 54, and thereby feeding a supply of material from supply source 32 to conduits 56 and 72. When the material is conveyed through conduit 72, and since the transition valve 12 is open material is deposited through the transition valve 12 into its respective receiving station.

When the level control switch 28 indicates that the particu lar related station no longer needs any material, it closes, thereby completing a circuit through lines 18 and 74, and energizing relay coil 76, whereupon relay contacts D and B which are normally closed, are opened. The opening of normally closed contacts D and B closes transition valve 12 and deenergizes coil 44 thereby opening three phase switch 52 and stopping the feed motor 54. Relay contacts A and C which are normally opened, are now closed. As it had been previously assumed, level control switch 30 was open and it remains open indicating a demand at its respective station. This demand is now fulfilled, since the closing of relay contact A transmits power to line 78, through normally closed relay contact B and line 80, thereby opening transition valve 14. At the same time, power is transmitted to the feed supply circuit through lines 34, 40, through normally closed relay contact D, to line 42, This energizes coil 50, closing three phase switch 52 and starting feed motor 54 which feeds the material through conduits 56 and 82 into the respective receiving station which is fed by transition valve 14.

It is apparent from this specification that the transition valves l0, l2 and 14 are operably actuated when the level control switches 26, 28, and 30 are closed thereby indicating demand at each respective receiving station. The station demand requirement is fulfilled in the system shown by FIG. 1, by first filling the station furthest away from the supply source 32, then sequentially filling the remaining stations, from the furthest in the distribution line to the nearest to the supply source 32. This sequence is established so that the conduits 58, 72, 82 and 56 can be substantially clear of residue material during the operable distributing time of the system. By using this sequence any material residue which remains in conduit 56 during the filling of the first station can be used to fulfill the demand of the second station, thereby limiting the amount of residue material remaining in the conduits which has to be purged therefrom during the purging operation to be described infra.

Upon completion of the filling operation, level control switch 30 is closed thereby energizing relay coil 84. The relay contacts B and D, which are normally closed are now opened, and relay contacts A, and C,, which are normally open are now closed. With the closing of relay contact A;,, power is transmitted to all the relays 62, 76 and 84 through lines 34, 66 and 78 thereby assuring that the relay windings 62, 76 and 84 remain energized even though a level control switch may at this time be open indicating a demand condition at that particular station. Concurrently with the closing of relay contact A, power flows through line 86, transmitting power to lines 88, 90 and 92, and due to the fact that relay contacts C,, C, and C,, are closed the transition valves l0, l2 and 14 connected thereto through lines 36, 68 and 80 are opened.

The opening of all the transition valves l0, l2 and 14 at this time insures that any residue material which remains in the conduits 56, 58, 72 and 82 from the distributing operation is cleared by drawing it into the nearest receiving station. it is seen then that upon completion of the distribution cycle the conduits are automatically purged of any residue material which may remain therein during the distributing operation. The duration of this purging operation is controlled by the pneumatic timer 20 since the energization of line 86 transmits power to coil 24 of the pneumatic timer 20 through line 94. When coil 24 is energized it opens the normally closed switch 22, thereby cutting off all power to the system.

The opening of the transition valves 10, 12 and 14 during the purging operation allowing the residue material to be transmitted into the nearest receiving station is also a safety feature, since the fan 60 is continuously drawing out and creating a vacuum within the conduits 56, 58, 72, 82 and 96. The vacuum so created if allowed to continue for an extended period of time without any relief would eventually collapse the conduits. The feed motor 54 is precluded after completion of the feeding and distributing operation and it does not commence feeding the stations again until the conduits are purged and the complete operation is recycled. It is during this interim period that the conduits may collapse, however, the invention eliminates this detrimental feature by opening the transition valves 10, 12 and 14 thereby not only purging the conduits of residue material but also preventing the collapse of the conduits.

The fan 60 can be electrically connected to the primary circuit as previously mentioned so that when switch 22 opens and shuts down the system, it can concurrently also stop the fan. In the embodiment shown in FIG. 1, the fan 60 is displayed independent of the main circuit, this showing is only for purposes of clarity and is not considered a limiting factor.

Pneumatic timer can be set to any specified length of time. This time period is functionally dependent upon the required distribution of the operation. The delay energization of coil 24 causes switch 22 to open and then to once again assume its closed position thereby beginning the distribution cycle all over again. This embodiment, of course, is not limited as shown to three stations, since stations can be added to either side of the distributing line without departing from the scope of the invention.

The number of receiving stations can be changed, either increased or decreased, by any desired number of stations at either end of the distributing system. That is receiving stations can be added at the right end of FIG. 1 by merely removing line 86 and inserting the desired number of transition valve relay combinations in parallel with those already existing. Line 86 would then be placed across the corresponding terminals of the last inserted stations. Other stations can also be added at the left end of FIG. 1 by removing line 94 and inserting in parallel with the existing stations a desired number of additional receiving stations, with the line 94 being replaced across the corresponding terminals of the left most station.

Reference is now made to FIGS. 2A, 2B and 2C which combine in the manner shown in FIG. 2 to make a complete circuit, The system shown therein discloses a distributing system with two remote sources ofsupply 100 and 102. These material supply sources 100 and 102 can contain different grades or types of the same material, or substantially the same grades of the same material (as for example different bales of similar cotton) depending upon the circumstances existing. The system also contains five receiving stations located at transition valves V,, V V V and V This number is not limitative in any way, for it can clearly be ascertained that more than five or less than five stations could be used without departing from the scope of the subject invention.

The system can distribute to the five stations from both supplies 100 and 102. The system as shown in FIG. 2 allows the material located in supply source 100 to be distributed to receiving stations V V, and V while supply material from material source 102 is distributed to receiving stations V, and V The station V located in the center of the distributing system is a swing station, it can be fed from either supply source 100 or 102, but not simultaneously.

The operation of distributing these different materials from their respective sources is now explained. Master terminal block 115 in FIG. 2C contains the terminals for the master control circuit for the distribution of material supply 100. The power to the system is fed into terminal blocks L, and L respectively. L, is the positive pole and L is the negative pole. Master terminal block 238 in FIG. 2A contains the terminals for he master control circuit which controls the distribution of material supply 102. Terminals L, and L of terminal block 238 are not connected to a power source. The presence of these blocks L, and L allows a choice to be made, in determining which terminal block will be the power lead in. Switch 116 in FIG. 2C is the on-off switch for the system. Upon closing of switch 116 the system is energized to commence distribution, if any of the receiving stations indicate a demand for the respective materials. The demand signals are generated in this system similar to those generated in the system of FIG. 1, that is by level control switches, which indicate demand through an open condition thereof. These level control switches are shown by numbers 118, I20, 122, 124 and 126. In this particular distributing system, however, before distribution commences the selection of the respective receiving stations which receive supply from either material source supplies or 102 is made. This selection is effected by a plurality of contact switches located on the lines to the swing" station V These selection circuits are indicated by numerals 128 and 130. As shown in FIG. 28 by the position of the relay contacts of selection circuits 128 and 130, the swing station V is connected to receive the supply from material supply source 100. This condition is established by closing contact switches a, b, c, d and e of selection circuit 130 and opening the switches a, b, c, d and e of the selection circuit 128. An automatic selection is afforded by energizing the relay coil 131 of selection circuit 130, while deenergizing relay coil 129 of selection circuit 128. With the energization of either the relay coil 129 or 131, its respective contact switches are closed and the swing station V is inserted into the line from which the material is desired to be fed. In place of these selection circuits shown as 128 and 130, a conducting plug could be used as shown at 132. When the conducting plug 132 is used in place of the selection circuits 128 and 130, it is manually inserted into the system.

For discussion purposes so that the system will be clearly understood its operation in selecting the stations which are to be fed along the line for distributing of material thereto is now described. For purposes of this description, it is assumed that stations represented and fed by transition valves V, and V, are fed from the material supply source 102, whereas the stations represented through transition valves V V, and V, are supplied through the material supply source 100. For the system to establish this selection, the switches a, b, c, d and e of the selection circuit 130 are closed and the switches a, b, c, d and e of selection circuit 128 are open. The selection having thereby been made, three stations are fed from supply 100 and two stations are fed from the other supply 102.

The distributing operation is now described. On'off switch 116 is closed thereby energizing line 134. Line 134 is connected to terminal block 9 which through lines 136, 138, 140, 142, 144, 146 and 148 is connected to all the terminal blocks 9 of the system. The timer control circuit 163 used for purging the conduits 150, 152, 154 and 156 is composed of relay coil I62 and switch 164. The purging operation is conducted independently by each master control when the distributing operation for each set of receiving stations has been completed. The timer control circuits and their relationship to the purging operations subsequent to the distribution operations is described infra. Switch 164 is normally closed. From amongst the receiving stations represented through transition valves V V, and V to be fed from material distributed from supply 100, transition valve V is the furthest away from the supply and it is therefore fed first. To feed this station first it is assumed that none of the other stations on this section of the line (V and V are being fed. The demand indicating means 122, 120 and 118 are therefore all open, indicating demand at each station. On conduit there are two cutoff valves which are manually inserted in the conduit 150. These cutoff valves 166 and 168 are inserted in the line depending upon the source which feeds station V If station V is to be fed from supply 100, cutoff valve 166 is inserted in conduit 150 and cutoff valve 168 is removed. On the other hand, if the station represented by transition valve V is to be fed from material supply source 102 cutoff valve 168 is inserted while cutoff valve 166 is taken out. The cutoff valves 166 and 168 could be controlled through a solenoid arrangement in conjunction with the selection circuits 128 and 130.

Level indicating switch 122 which generates the demand signal for station V is open indicating that station V is demanding that material from supply 100 be delivered to it. Transition valve V is opened (when switch 116 is closed and level control valve 122 is open) through the following circuit: lines 135, normally closed switch 164, 137, 139, 141, switch c of selection circuit 130, lines 143, 172, terminal block 4 ofdistributing control circuit 108, line 174 through contact B of distributing control circuit 108, which is normally closed, to line 176, terminal block 7 to line 178 and relay coil 180. The energization of coil 180 opens valve V placing it in a condition to receive supply from the supply source 100. Simultaneously the power from terminal block 4 of distributing control circuit 108 is transmitted to the feeder control circuit 182, located in FIG. 2C adjacent to the timer control circuit 163, through the following circuit: from terminal block 4 of distributing control circuit 108, through normally closed contact D of distributing control circuit 108, through line 184 to terminal block 5 of control circuit 108 via line 186, line 188 through switch (1, which as previously stated is closed, through line 190 and to line 192 to terminal block 5 of the master control block 115, then through line 194 through safety switch 196, which is normally closed, to relay coil 198 to line 200, which is connected to the negative pole of the master control terminal block 12. The energization of coil 198, of feeder control circuit 182, closes switch 202 which is the control circuit, through lines 204 and 206, for the material supply source 100. The terminals and 11 of the master control terminal block 115 are connected to motor and switch arrangement (not shown) as specifically shown in FIG. 1.

When this motor is activated material from supply source 100 flows through conduit 150 to the open transition valve V being stopped at V by the cutoff valve 166, and it continues to flow into the receiving station over which transition valve V is located until the level control switch 122 indicates that the receiving station under transition valve V is filled and its demand has been satisfied. The material is carried through the conduits by the vacuum created therein by fan 310.

The fan 310 is shown to be energized through an independent source 311, but it would be of ordinary skill in the art, to connect the fan 310, so that it is operationally dependent upon the distributing system.

The closing of switch 122 energizes relay coil 208 of distributing control circuit 108 through lines 207, 209 and the energization of relay coil 208 opens the normally closed contacts B and D of distributing control circuit 108 while simultaneously closing the normally open contacts A and C of the same distributing control circuit 108. The reversal of these contacts closes the transition valve V by deenergizing its control winding 180, and through the opening contact D terminates the feeding operation by deenergizing relay feed winding 198. Relay control winding 208 of distributing control circuit 108 remains energized as long as level control valve 122 remains closed and also as long as contact A remains closed. Contact A functions as a lockin contact for relay coil 208.

Upon the satisfaction of demand or the receiving station which is fed through transition valve V transition valve V opens since the demand control switch 120, which is the level control switch of the station fed by transition valve V is open thereby indicating demand. Transition valve V is opened through the following circuit: from terminal block 3 of distributing control circuit 108, line 212, switch e of selection circuit 130, line 214, line 216, line 218, through normally closed contact B of distributing control circuit 106, line 220 to terminal block 7 of distributing control circuit 106. Line 222 then energizes relay coil 224, thereby opening the transition control valve V,,. The circuit is completed through line 226 to terminal block 8 of distributing control circuit 106, which is connected to the negative terminal block 2 of distributing control circuit 106. The transition control valve V is now open and capable of receiving material supplied from the material supply source 100. To fulfill this demand the feeder control circuit 182 is energized throughthe following circuit: from terminal block 4 of distributing control circuit 106, through normally closed contact D of distributing control circuit 106 through lines 228 to terminal block 5 of distributing control circuit 106, through line 230, line 232 to line 190. This circuit energizes the feeder control relay 198 of feeder control circuit 182, thereby closing switch 202 and energizing the motor (not shown) of the supply 100.

Material supplied from material source is conveyed by conduits 150 and 154 to transition valve V,, which allows the material to be dumped into the receiving station located below it. This operation continues until level control demand indicating means closes, indicating that the supply demand of the station fed by transition valve V,, has been satisfied. The closing of level control switch 120 energizes relay coil 234 of distributing control circuit 106 through line 219. This energization closes the normally open contacts A and C of distributing control circuit 106, and opens the normally closed contacts B and D. This reversal, similar to the reversal which took place in the distributing control circuit 108, deenergizes the relay coil 224 of transition valve V and it also cuts off the power to relay 198 of feeder control circuit 182. Distributing control circuit 106 is in the state of energization having contacts A and C closed and B and D open.

The equivalent distributing operation for the feeding of the receiving stations by transition valves V and V is performed to feed through transition valve V since level control switch 118 is open indicating that the station requires material to be fed to it. This control operation is performed through distributing control circuit 104, which is shown in block form but the wiring thereof is in all respects equal to the wiring of distributing control circuits 106 and 108. When demand to the station controlled through transition valve V is satisfied, distributing control circuit 104 deenergizes winding 236, closing the transition valve V and simultaneously shutting off the feed supply from material supply source 100.

At the termination of the feeding operation the contacts of distributing control circuit 104 (i.e., A, B, C and D) are in the same position as the contacts shown for distributing control circuits 106 and 108, that is contacts A and C are closed while contacts B and D are open. It is noted that when the relays 208 and 234 are energized, at the closing of the level control demand switch 120 and 122, they remain energized even if the demand switches 120 and 122 open, since the contact A of distributing control circuits 104, 106, and 108 lock the relay coils of the respective relays in an energized condition. This assures that the receiving stations are sequentially filled without interruption from a receiving station further away from the supply source, whose demand switch is generating a demand signal, while a closer station is being filled.

The switches a, b, c, d and e of selection circuit 128 as stated above, are open indicating that only the receiving stations under V and V are fed from material supply source 102. Continuing the same sequence of feeding, that is, feeding the furthest receiving station away from the material supply source 102 first, the receiving station under V is fed first. Master control terminal block 238 is equivalent to the master control terminal block 115, except that the two power line blocks L and L are not connected to a power source. This is a matter of choice and does not affect the operation of the system. It can be appreciated that the power source in this distributing system can be connected to either master control terminal block at the convenience of the plant installation requirements. Switch 240 is the on-off switch for the distribution of material from source 102, when it is closed the circuits in conjunction therewith are energized. Power to energize this section of the distributing system is received from lines 136 and 148 which are connected to terminal block 9 of the master control terminal 115. This power is forwarded to the terminal block 9 of master control terminal 238 through lines 170, 242 and 148.

From terminal block 9 of the master control terminal 238 power is introduced into the distributing system for supply 102 through line 244, timer control circuit 246, which is composed of relay 250 and switch 248, the latter being normally closed. Power is transmitted through line 252 to terminal block 1 on the master control terminal block 238. Assuming once again that level control switch 124, of the receiving station controlled by transition valve V is open and is indicating demand. Level control switch 126 of transition valve V, is also open and is indicating demand, however, the system feeds the receiving station furthest away from the source 102 first.

This distributing operation transpires as follows. Power from terminal block 1 of master control terminal 238 is conducted to distributing control circuit 110 via the following lines: 254, 256, 258, 260, through switch a of selection circuit 130, line 262, 264, 266, 268 to terminal block 4 of distributing control circuit 110. The control winding 270 for transition valve V is energized through the following circuit, from terminal block 4 ofdistributing control circuit 110: line 272, contact B of distributing control circuit 110 to line 274 and terminal block 7 of distributing control circuit 110, line 276 and return line 278 which is connected to terminal block 8 of distributing control circuit 110. The circuit is completed to ground terminal 2, through line 279. The transition valve V is now open and material from supply source 102 can be fed to It.

The feed control circuit 294 for supply source 102 is activated through the following circuit: from terminal block 4 of distributing control circuit 110, through contact D of distributing control circuit 110, via line 280 to terminal block of distributing control circuit 110. Power is then conducted via line 282, 284 to terminal 5 of the master control terminal block 238. Relay coil 286 is energized from terminal block 5 of the master control block 238, via line 288 and switch 290, which is a safety switch and which is normally closed. The energization of relay coil 286 closes switch 292 of feeder control circuit 294 energizing thereby the terminals 10 and 11 on the master control terminal block 238. These terminals 10 and 11 are connected to a feed supply motor similar to the one described in the operation of FIG. 1. When this feeder supply circuit is energized the material supply from source 102 is conveyed through conduit 150 and 158, feeding material into the receiving station controlled through the transition valve V When the supply demand of the receiving station is fulfilled, level control switch 124 is closed and it activates the relay coil 296 of distributing control circuit 110. The energization of the relay coil 296, of distributing control circuit 110, is accomplished only when level control switch 124 closes thereby energizing terminal block 3 of distributing control circuit 110 through lines 298 and 300. The power from this terminal block 3 of distributing control circuit 110 energizes relay coil 296 through lines 302 and 304. When coil 296 is energized the normally closed contacts B and D are open and the normally open contacts A and C are closed. This reversal, similar to the distributing control circuits described in the operation of the transition valves V V and V closes the transition valve V and terminates the feeding operation by deenergizing relay coil 286 of feeder control circuit 294.

The receiving station fed through transition valve V, and whose demand is indicated by level control switch 126 is now fed in a similar manner as the receiving station fed by transition valve V This feeding operation is controlled through distributing control circuit 112 and control winding 306 of transition valve V,. The terminal block 4 of distributing control circuit 112 receives its power, when level control switch 214 closes, through lines 300 and 301.

When the receiving stations demand has been satisfied from the sources 100 and 102 the conduits 150, 154, 156, 158 and 160 are purged of any material which remains as residue in these conduits during the distributing operation. The purging operation for stations fed by transition valves V V and V need not wait until the feeding operation of stations fed by transition valves V, and V is completed. The purging like the feeding operation of each set of stations can be conducted independently of the other set of receiving stations. Assuming that the distributing operation for the receiving stations at transition valves V, and V has been completed and the relay coils of the distributing control circuits and 112 are energized and have reversed the normal positions of the respective contacts A, B, C and D of the distributing control circuits the purging operation commences. From the diagram in H0. 2A it is noted that when coil 296 of distributing control circuit 110 is energized, contacts B and D controlling the feeding of material and the opening and closing of the transition valve respectively are open while contacts A and C are closed. The closing of contact A when demand has been fulfilled to the receiving station under transition valve V assures that the next station, that is V,, will have its demand satisfied even though at the same time level control switch 124 of transition valve V may be open. In other words, contact A locks in the relay coil 296, to assure that the demand of the station under V, is satisfied and that the demand of station V must wait its respective turn before it is filled.

When contact C of distributing control circuit 110 is closed the control winding 270 of transition valve V is capable of being energized opening thereby transition valve V However, before this energization takes place the demand of the receiving station fed through transition valve V, and indicated by level control switch 126 must be satisfied. When demand of this receiving station is fulfilled, level control switch 126 closes and reverses the contacts A, B, C and D of distributing control circuit 112 and the same state of probable energization of control winding 306 of transition valve V, is established. Power to energize these windings 270 and 306 is consequently received through lines 305, 307 and 308 when level control switch 126 closes, since terminal block 4 is in an energized condition. When line 308 is energized, it concurrently energizes block 6 of the terminal block of distributing control circuit 112, and also block 6 of terminal block of distributing control circuit 110, via lines 311, 313 and 315. This energizes the control windings 270 and 306 through closed contacts C of distributing control circuits 110 and 112, of transition valves V, and V thereby opening the transition valves and allowing the purge of residue in conduits 150, 158 and to take place. The timing period of the purge is controlled through the pneumatic timer control circuit 246 which can be chosen according to the prescribed requirements of the distributing system. The timing period is determined by the delay time coil 250 which is used in the system. The time delay coil 250 is energized through lines 311, 317, 319 and 321. The completion of the purge is accomplished when the time delay period established through the relay coil 250 has elapsed, this opens switch 248, which is normally closed, thereby shutting off the power to all the control circuits which are in a control position for the set of stations fed through transition valves V, and V,. This set is now ready to commence the distributing operation once again from material supply source 102.

An equivalent purging operation is performed for the conduits 150, 154 and 156 leading to transition valves V V, and V This purging operation, however, is commenced whenever the receiving station being fed by transition valve V indicates that its demand has been fulfilled. This condition occurs when level control switch 118 closes. As previously ascertained, the distributing control circuit 104 is equivalent in every respect to the other distributing control circuits 106, 108, 110 and 112. Therefore, when level demand switch 118 closes, it energizes the relay coil of distributing control circuit 104, reversing the states of contacts A, B, C and D. This closes transition valve V and shuts off power to the feeding control circuit 182.

The purging circuit for the set of transition valves V V and V is energized from terminal block 4 of distributing control circuit 104, through lines 327, 329 and 331. This places blocks 6 of all the terminal blocks of distributing control circuits 104, 106 and 108 in an energized condition via lines 333, 335, 337, 339 and 341. Concurrently it energizes block 6 of master control terminal block 115.

With the energization of blocks 6 of the distributing control circuits 104, 106 and 108, the control coils 180, 224, and 236 of the transition valves V V and V are energized, since all contacts C are closed. This opens the transition valves V V, and V The fan 310 being in continuous operation, now draws any residue material found in the conduits 150, 154 and 156, into the nearest receiving station.

The time period of the purging operation is controlled through the pneumatic timer control circuit 163, composed of time delay relay 162 which is energized via lines 343, 345 and 347. When the time delay relay is fully energized, it opens switch 164, thereby terminating the purging operation. After a certain predetermined lapse of time, switch 164 assumes its normal closed position, and the distributing operation to the receiving stations being fed by transition valves V V and V is commenced.

At any time after the purging operation the selection cir cuits 128 and 130 may be reversed, so that the receiving station being fed by transition valve V is fed from material supply source 102, instead of material supply source 100. It can be readily ascertained then, that by using this system a distributing operation can be conducted which distributes two different materials from two remote and different supply sources concurrently and which are independently controlled.

The conduits are supplied with a vacuum for conveying the material thereby distributed. This vacuum is created through the fan 310. This fan 310 can be controlled magnetically by the master controls, however, for expediency in description and clarity of the invention, it is shown to be independent of the control circuits of the distributing system.

FIG. 3, consisting of FIGS. 3A and 3B, discloses another distributing system in which the selection of the receiving stations is automatically performed and it is extremely versatile due to the fact that the stations which are fed by the distributing system can be fed all from one supply at one time, or all from the other supply at another time, or a predetermined number of stations can be fed by each of the material sources so that only that number is fed by one source. The particular system which is shown consists of four stations, but is not necessarily limited thereto, more stations could be added to the system without destroying the inventive concept. In this system two sources A and B are shown, and each source can feed all four receiving stations or the nearest two, or the nearest one by automatically selecting which stations are to be fed from each respective source prior to the commencement of the distributing operation.

In this system as in the last system shown by FIG. 2, two master controls are needed, shown here as 400 and 402. A distributing control circuit is necessary for each receiving station shown as 404, 406, 408 and 410. The selection circuits in this embodiment are shown as a series of switches 412, 414, 416, 418 with five position switches within the selection circuits which are designated as a, b, c, d and e. All four of the selection circuits 412, 414, 416, and 418 are joined and operated concomitantly. The positions of the stepping switches a, b, c, d and e within the selection circuits determine which receiving stations are fed from which material supply source. For convenience of description the stepping switches a, b, c, d and e are further subdivided into numerals 1, 2, 3, 4 and 5. These terminals are delineated only in stepping switch a of selection circuit 414. The five positions which are available indicate the five probable combinations of distribution which the system can assume.

In position 1 all four receiving stations are fed from the right-hand material supply designated as B. At position 2 of the stepping switches a, b, c, d and e the distributing system feeds three stations (V,, V, and V from the right-hand supply B while feeding one station (V,,) from the left-hand supply A. In position 3 the system feeds evenly two stations (V, and V from the right-hand supply B and two stations (V and V from the left-hand supply A. In position 4 the system feeds one station (V,) from the right-hand supply B and three stations (V,,, V, and V from the left-hand supply A. In position 5, as shown in the schematic circuit of FIG. 3, the system feeds all four receiving stations located below the transition valves V,, V V and V, from the left-hand supply A. Only four stations are shown for convenience, it is understood that more than four stations could be used and that only two stations need be used, and still remain within the inventive concept of the subject invention.

In this distributing system like the system of FIG. 2 cutoff valves are required to separate the receiving stations when a number of them have been selected to receive particular material. These cutoff valves are shown in the conduits as 624, 626, 628, 630, 632, 634, 636, and 638. The cutoff valves are inserted into conduit 488 according to the preselection of the number of receiving stations, for example, if the system feeds two stations V, and V from the right-hand material source B and two stations V and V, from the left-hand material source A, then cutoff valves 628 and 634 are inserted into conduit 488. If all four stations V, to V, are fed from the righthand material source B then only cutoff valve 626 would be required, alternatively if all four stations are fed from the lefthand material source A, then only cutoff valve 636 would be required in the conduit 488. The cutoff valves are manually inserted into the conduit 488, however, it would be a matter of ordinary skill to correlate their operation with the selection circuits.

The system as shown in FIG. 3, the operation thereof, is now fully explained. The power switch, designated as a simple onoff switch at 420, is located at the master control circuit A. This switch 420 could be located at either master control circuit A or B, it is shown at the master control A location merely for convenience. With the closing of switch 420 the complete distributing system is energized. Line 422 leads to block 9 of terminal block 424. From there through line 426 it leads to block 9 of terminal block 428 located at the master control circuit B. With the stepping switches a, b, c, d and e of the selection circuits 412, 414, 416 and 418 in position 5, as shown in the schematic, the master control circuit B and the supply source controlled therefrom is completely cut off from the system. This can be ascertained by following the circuit from the master control block 428 at block 1, which is the lead in energization block for the circuit to line 430. At position 5 of the stepping switches a, b, c, d and e of the selection circuits the contacts connecting to line 430 are all open. Therefore, the master control circuit B and its supply source are effectively cut offfrom the distributing system.

Returning now to the master circuit control A, the active operation of the distributing system as shown by FIG. 3, is fully described. Power from the input in switch 420 is fed to terminal 1 of the master terminal block 424 through lines 432, switch 434, which is normally closed and line 436. Switch 434 and relay winding 438 compose the time control circuit 440, as will be explained later this timing control circuit 440, controls the purging period described in the systems of FIGS. 1 and 2. Lines 442 and 452 leading out from terminal 1 of the terminal block 424 connects the last receiving station in the line with the control circuit A. As explained in the previous systems of FIGS. 1 and 2 the distributing system feeds the furthest station away from the supply source first. This is a feature which is inherent in the system and it allows for the purging operation to be effectively conducted at the termination of the distributing operation and it also allows an automatic feeding on demand of each receiving station without overloading the conduits with material being distributed. The demand in each of the receiving stations is indicated by level control switches numbered 444, 446, 448, 450. These demand switches are located in each respective receiving station and are connected to the distributing control circuits 404, 406, 408 and 410. For this explanation it is assumed that all the receiving stations are demanding material, that is, the level control demand switches 444, 446,448 and 450 are all open.

With the stepping switches a, b, c, d and e of the selection circuits 412, 414, 416 and 418 in position number 5 the receiving station being fed through the transition valve V, is

fed first. The transition valve V, is normally closed but is open through the following circuit: line 442, line 452, through position of stepping switch a of selection circuit 418, line 456 and line 460. This leads to block 4 of terminal block 462 of distributing control circuit 410. From block 4 transition valve V, is activated through the following circuit: line 464, line 466, B, of distributing control circuit 410, line 468 to terminal control block 7. This opens transition valve V, by energizing coil 470. The feeding control circuit 484 is activated through line 472, contact D, of distributing control circuit 410, line 474 to terminal 5 of terminal block 462. From this block 5 the circuit follows line 476 through position 5 of stepping switch d of selection circuit 418, line 478, line 480 to block 5 of terminal block 424 of the master control circuit A. This energizes coil 482 of the feeding control circuit 484, thereby closing switch 486 which is normally open. The closing of switch 486 energizes terminals and 11 of the terminal block 424. The terminals 10 and 11 are connected to a three phase motor feeding arrangement similar to the material supply feed of HO. 1. The energization of this feeding circuit allows material from A to be fed in through conduit 488 to conduit 490, wherein the transition valve V, is located, and the material A is dumped into the receiving station.

The material is conveyed through a vacuum system created in the conduit by fan 492 and exhaust conduit 494. The fan 492 can be controlled through both master controls A and B, however, for convenience it is shown to be of independent control and energized through power source 496,

Level control demand switch 444 closes when the demand of the receiving station fed through transition valve V, is fulfilled. The closing of this switch activates coil 490 and reverses the positions of the contacts controlled therefrom, namely contacts A,, B,, C, and D, of distributing control circuit 410. Contacts A, and C, which are normally open are closed, contacts B, and D, which are normally closed are opened. The opening of contact B,, closes the transition valve V, by deenergizing coil 470 (the opening of contact D, deenergizes the feeding circuit at master control circuit A by deenergizing coil 482), thereby opening switch 486 and stopping the feed of material A.

The receiving station located by transition valve V, is now fed from the material supply A, since it was assumed that level control switch 446 was initially open. The transition valve V of distributing control circuit 408 is opened through the closing of level control valve 444 of distributing control circuit 410 which not only energizes coil 498, reversing the contacts controlled therefrom, but it also energizes block 3 of terminal block 462 through line 500. Line 502 leading to stepping switch b of selection circuit 418 through line 504 leads into stepping switch c at position 5 of the selection circuit 416. This leads to block 4 of terminal block 506 via line 508. Coil 514 of transition valve V is energized from block 4 through line 510, contact B, which is normally closed, line 512 and block 7. With transition valve V now open, the material from supply A can be fed to its receiving station when the feeding circuit 484 is concurrently energized.

The feeding circuit is energized from block 4, line 510, contact D which is also normally closed, line 516 to terminal block 5, to position 5 of stepping switch d of the selection circuit 416 via line 518, to line 520, line 480 to block 5 of terminal block 424. This energizes the feeding control circuit 484 in the same manner as previously described for the feeding through transition valve V,.

The feeding control circuit 484 now feeds material A through conduit 488 to conduit 522 and dumps the material through the open transition valve V into its respective receiving station. When the demand of the receiving station fed by transition valve V is fulfilled level control switch 446 is closed indicating that the demand of the receiving station has been fulfilled. The closing of switch 446 energizes coil 524 thereby opening the normally closed contacts B and D and closing the normally open contacts A and C This reversal closes the transition valve V, by deenergizing coil 514 and cuts off the feeding circuit 484 by deenergizing coil 482.

The receiving station fed by transition valve V is now fed, since the level control switch 448 is initially open, as previously assumed, thereby indicating a demand at this station. The transition valve V is opened when the closing of level control switch 446 energizes block 3 of terminal block 506 through line 526. Consequently block 4 of terminal block 532 is energized via line 528, position 5 of stepping switch b of selection circuit 416, then through line 530 to position 5 of stepping switch c of selection circuit 414. This establishes a voltage at block 4 of terminal block 532 of distributing control circuit 406 through line 534.

Coil 536 of transition valve V is energized from block 4 of terminal block 532 through line 538 contact B of distributing control circuit 506 and line 540 which leads to block 7 of terminal block 532. Concurrently the feeding circuit is energized through line 542 emanating from block 4 of terminal block 532 through contact D of distributing control circuit 406, line 544, block 5 of terminal block 532, line 546, position 5 of stepping switch (1 of selection circuit 414, line 548 to line 480. This, energizes the coil 482 of the control feed circuit 484. The energization allows material A to be fed through conduit 488 to conduit 550 and to the receiving station fed through transition valve V When level control switch 448 closes thereby indicating that the demand at this respective receiving station has been fulfilled it energizes coil 552 thereby opening the normally closed contacts B,, and D and closing contacts A; and C of distributing control circuit 406. This reversal once closes the transition valve V, by deenergizing coil 536 and terminates the feeding of material A from source supply A by deenergizing coil 482 offeeding control circuit 484.

With the closing of level control switch 448 transition valve V, is open through the following circuit: line 554, block 3 of terminal block 532, line 556, position 5 of stepping switch b of selection circuit 414, line 558, position 5 of stepping switch 0 of selection circuit 412, line 560 and block 4 of terminal block 562, line 564, contact B, of distributing control circuit 404, line 566 and block 7 of terminal block 562. This energizes coil 565 of transition valve V, thereby opening transition valve V, and allowing material to be fed to its receiving station. The feeding circuit is energized through line 568, contact D, of distributing control circuit 404, line 570 through block 5 of terminal block 562, line 572, through position 5 of stepping switch d of selection circuit 412, to line 574 and line 480. This energizes coil 482 of feed control circuit 484 through block 5 of terminal block 424. Material A is fed by conduit 488 to conduit 576 through the transition valve V, and into its respective receiving station.

When the demand of the receiving station is fulfilled level control circuit 450 is closed energizing thereby coil 578, This coil reverses the normal positions of contacts A B,, C and D deenergizing the coil 564 of transition valve V, and concurrently deenergizing coil 482 of feeding circuit 484 terminating the feed of material A to the receiving station fed by transition valve V The closing of level control valve 450 not only terminates the distributing operation but it indicates that the system is ready to be purged since the receiving station fed through transition valve V is the last station in the line. When level control switch 450 closes it energizes the time control circuit 440 and it opens all the transition valves so that any residue remaining in the conduits 488, 490, 522, 550 and 576 is purged through the transition valves V,, V V and V, into the nearest receiving station. This operation is accomplished in the following manner. Block 3 of terminal block 562 is energized through line 580 when level control switch 450 closes. The line 582 leading therefrom activates transition valves V, through position 5 of stepping switch b of selection circuit 412, block 6 of terminal block 562, through line 586, contact C, of distributing control circuit 404 which is now closed, due to the energization of coil 578, through line 566 to block 7 of terminal block 562. This opens transition valve V The other transition valves are energized from line 584 through position 5 of stepping switch e of selection circuit 412, through line 587 and line 588. Transition valve V is activated through the circuit composed of line 590, line 592, block 6 of terminal block 532, line 620, contact C and line 540. Transition valve V is opened through the circuit ofline 588, line 594, line 596, block 6 of terminal block 506, contact C and line 512. Transi tion valve V is opened through line 588, line 598, line 600, line 602, contact C, of distributing control circuit 410, and line 468. Concurrently, through line 588, the timing control circuit 432 is energized through block 6 of terminal block 424 and line 604.

Coil 438 of time control circuit 440 is a pneumatic delay relay type of coil; it closes switch 434 when it becomes energized and it opens switch 434 after a definite time lapse, functionally determined by the size of the system. When the delay time has elapsed coil 438 is completely deenergized and switch 434 is once again closed commencing the distributing operation once again.

The master circuit B is composed of the same two basic circuits as master control circuit A, that is, the feeding control circuit 606, composed of a switch 608 and coil 610, and the time control circuit 612, also composed of a delay type relay of coil 614 and switch 616. The master control circuit B controls the distributing operation of the material B in exactly the same manner as master control A when the stepping switches a, b, c, d and e are in their proper positions as previously ascertained.

The versatility of this system is not limited by the number of stations which is to be fed and it must be understood that the number shown in the figures is merely drawn for exemplary purposes and is not to be limiting. The stepping switches are shown in a straight line manner also as a matter of convenience, in practice they are usually rotary switches which can assume five different positions as selected by the operator of the system.

The number of stations can be changed, either increased or decreased, by any desired number, at either end of the system. The addition or subtraction of stations can be accomplished by inserting the control circuit for distribution and the selection circuit for selectivity by adding these circuits in parallel with the existing stations without mitigating the inventive concept of the subject invention.

Reference is now made to FIG. 4 which illustrates another embodiment of the invention in schematic whereby the distributing system has the ability to feed all of the stations from one of two sources or a predetermined number of stations from one supply and the rest from the other. This system is especially versatile and flexible in that the source which feeds a given station can be changed by throwing a ganged switch, inserting a single plug or manual cutoff valve into the conduit 676 through which the fiber passes and removing another plug. In this embodiment, two sources of fiber, source A and source B, are adapted to feed fibers, which are suspended in a moving air stream, in the same manner as described in connection with FIGS. l3, to stations 650, 652 and 654. As will become apparent from the following detailed description of the operation of FIG. 4, this embodiment is not limited to any particular number of stations, and it will become obvious how more stations can be added or deleted.

In this embodiment, as in the embodiments shown in FIGS. 2 and 3, a Master Control comprised of a number of relays which cause the source to feed fibers into the conduit 676 and which cause purging after all stations demanding fibers have been supplied is associated with each source. Master control 656 is associated with source B, and master control 658 with source A. The distribution system for both sources is energized by applying an electrical potential, for example 1 10 volts AC, between lines 660 and 662. For purposes of illustration, line 660 is shown connected to the positive pole ofan alternat ing current source, and line 662 to the negative pole.

As in FIGS. 1, 2 and 3, transition valves 666, 668 and 670 are associated with stations 650, 652, and 654 so that when any of these valves are opened, fiber is extracted from the conduit 676 and air which was carrying the fiber passes on into the conduit 678, drawn by the fan 680. Fan 680 may be energized by applying an electrical potential between the lines 682 and 684 in the same manner as shown and discussed in connection with FIGS. 2 and 3, or the fan may be energized only when fiber is being distributed or the system purged. Alternatively, each station may have an individual fan associated with it. The operation and structure of transition valves such as valves 666, 668 and 670 are described more fully in connection with FIG. 5.

The distribution system of this embodiment is capable of supplying the fiber requirements of any of the stations 650, 652 and 654, whenever any of the level control switches, 682, 684 or 686, respectively associated with each of these stations, is opened, indicating thereby the need for additional fiber at that station. The position of each of the ganged switches 690, 692 and 694, each of which is comprised of five individual switches, determines from which source the station associated with that switch is to be fed. For example, when any of the ganged switches is positioned in the up position that ganged switch 690 is shown in, then that station will be fed solely from source B. When any of the ganged switches is positioned in the down" position that ganged switch 694 is shown in, then that station will be supplied solely from source A. This choice between up" or down positions is of course arbitrary, and is made solely for the purpose of detailing the operation ofthis embodiment. This embodiment could also be used with more than two sources by adding additional positions which the ganged switches can assume and additional circuitry in the same manner as the circuitry already present. Therefore, whenever the ganged switches are in the positions shown in FIG. 4, stations 650 and 652 will be supplied from the source B and station 654 will be supplied from source A. It is apparent that all three of the stations could be supplied from either source or two could be supplied from one and one from the other. Any of the stations can of course be removed from the system so that no fiber is supplied to it by throwing the appropriate on-off switches as described below.

In this embodiment, stations which are shown closest to each supply need not be supplied from that source. Furthermore, if two or more stations are demanding fiber from either supply, stations to the left" receive fiber first. Neither of the conditions necessarily is indicative of the actual physical arrangement since the stations can be physically disposed in any location, regardless of their position in the schematic of FIG. 4, so that station 650, for example, could be just as easily located next to source A as source B. It should then be obvious that the arrangement of switches on FIG. 4 is not a limitation.

Assuming that the ganged switches 690, 692 and 694 are all in the position shown and that the level control switches 682, 684 and 686 are all open, calling for fiber, the operation of this embodiment will now be detailed. Whenever all of the level control switches of all of the stations to be fed from source B are closed, indicating no need for fiber at any of the stations, current passes through coil 696 of recycle timer relay 698 and coil 700 of relay 701, preventing the distribution system which distributes fiber from source B from operating, while also interrupting the circuit which supplies the electrical excitation to cause source B to supply fibers. When this embodiment is then operated with the ganged switches 690, 692 and 694 in the positions shown in FIG. 4 with stations 650 and 652 then supplied from source B and station 654 from source A, a current path leads through coils 696 and 700 via lines 660 and 702, normally closed switch 704, line 706, switch 708 of ganged switch 690, lines 710 and 712, closed level control switch 682, lines 714 and 716, switch 718 of ganged switch 690, line 720, switch 722 of ganged switch 692, lines 812 and 814, level control switch 684, lines 838 and 840, switch 726 of ganged switch 692, line 728, switch 730 of ganged switch 694, line 732, switch 734 of ganged switch 694, line 736, coils 696 and 700, and line 662.

The passage of current through coil 700 opens normally closed switch 737 immediately, cutting off the current which was flowing through coil 738 of feeder relay 739 via lines 660, 

1. In a material distributing system for use with a plurality of material sources and a plurality of stations to be fed from said sources, the improvement comprising: suction conveyor means connecting said sources to said stations including means connecting a first number of said stations to one of said sources, and a second number of said stations to a second one of said sources, with a given number of the stations in said first and second numbers thereof being connected by said conveyor means to both said one and second sources, means for selecting from said given number of said stations a respective predetermined number thereof to be fed by said sources mutually exclusively so that only one source can be used at a time to feed any given station, and control means including electrical control means for feeding source material via said conveyor means to said stations in accordance with said selection by said selecting means.
 2. In a system as in claim 1 wherein said means for selecting a predetermined number of said stations includes selecting switches.
 3. In a material distributing means as in claim 1 wherein said selection means comprise insertable circuit plugs.
 4. In a system as in claim 1 including circuit means for feeding the furthest receiving station away from said plurality of material sources first and continuing serially to the nearest of said material sources.
 5. A system as in claim 1 including control means for preventing the feeding of stations furthest away while the closer stations to the material supply sources are being filled.
 6. A system as in claim 1 wherein said means for feeding source material can feed the predetermined number of selected stations concurrently from the respective maTerial sources.
 7. A system as in claim 1 including valve cut-off means for said conveyor means whereby material can be conveyed from one of said material sources to one of said stations indicating demand for said material without interference from material being conveyed to another receiving station from another material source.
 8. In a system as in claim 1 including means associated with each said station having a first electrical condition indicating demand for said fibers and a second electrical condition indicating no demand for said fibers, and wherein said control means includes means associated with each said source for checking one at a time and in a given sequence the demand indicating means of each of the stations fed by that source and for feeding until the associated demand indicating means indicates no demand, each of the stations checked, which, when checked, had an associated demand indicating means indicating demand, before checking the next demand indicating means in said given sequence.
 9. In a system as in claim 8 wherein said control means includes circuit means associated with each said source for purging said conveying means of excess material after said checking and feeding means associated with that source has checked all of the stations fed by that source and fed those sources having demand indicating means indicating a demand position when checked.
 10. In a material extracting system of the type having pneumatic means for conveying material to a plurality of stations, means at each of said stations for indicating demand or no demand of said material, and actuable distributor means at each station for extracting said material from said conveying means when actuated, the improvement comprising: a plurality of material supply source means, connected to said conveying means so that at least a single station can be served by more than one of said source means, for concurrently providing material to be distributed to said stations, first electrical control means responsive to the station demand indicating means for controlling actuation of the respective distributor means in accordance therewith so that each source distributes material to at most one station at any one time, and second electrical control means for selectively determining from which of said source means material is distributed to each of said stations which can be served from more than one of said source means upon respective demand therefrom.
 11. A system as in claim 10 wherein said second electrical control means are a plurality of selecting switches.
 12. A system as in claim 10 wherein said first electrical control means responsive to station demand serially controls the feeding operation to the preselected number of stations.
 13. A system as in claim 10 wherein said first electrical control means responsive to station demand indicating means controls the serial feeding of said preselected number of stations whereby the furthest station from the material supply source is fed first and the closest is fed last.
 14. A system as in claim 10 including third control means for preventing the feeding of stations furthest away while the closer stations to the material supply sources are being filled.
 15. In a material distributing system of the type having means for conveying material to a plurality of stations, means at each of said stations for indicating demand or no demand of said material, and actuable means at each station for extracting said material from said conveying means when actuated, the improvement comprising: a plurality of material supply means for concurrently providing material to be distributed to said stations at a selectively determined sequence, first electrical control means for selectively determining a respective number of stations to be filled from each of said material supply means, second electrical control means responsive to the station demand indicating means for controlling actuation of the respective extrActing means at each of said stations in accordance to the demand indicated, and sequencing means serially controlling said second control means whereby demand will be serially fulfilled after the selection of a series of stations to be filled from each supply means is made.
 16. A system as in claim 15 wherein said second electrical control means responsive to the station demand indicating means controls the feeding of the station furthest away and feeding the next closest et seriatim.
 17. A system as in claim 15 wherein two of said plurality of material supply means are remotely located from each other at the ends of said conveying means and wherein said first electrical control means determines which of said selected number of stations is to be fed by which of said remotely located sources.
 18. A system as in claim 17 including valve cut-off means for said conveyor means whereby material can be conveyed from one of said sources to said number of preselected stations without interference from material being conveyed to other stations from said other material source.
 19. In a material distributing system, a plurality of material sources, a plurality of receiving stations to be fed from said sources and having actuable transition valves, suction conveying means connecting each of said sources to each of said receiving stations, means for selecting a predetermined number of receiving stations to be fed by each of said sources so that only one source is selected to feed any given number of stations, means for concurrently feeding source material from said sources to said receiving stations so that each said source feeds at most one station at any given time in accordance with said selection by said selecting means, means for purging said conveying means at the completion of said feeding, means for automatically determining the sequence of feeding the number of selected stations from the respective material source, and means for indicating demand or no demand at each of said receiving stations whereby each station can be filled upon demand through said actuable transition valves.
 20. In a material distributing system for use with a plurality of material sources and a plurality of stations to be fed from said sources, the improvement comprising: pneumatic conveyor means connecting said sources to said stations including pneumatic means connecting a first number of said stations to one of said sources, and a second number of said stations to a second one of said sources, with a given number of the stations in said first and second numbers thereof being connected by said conveyor means to both said one and second sources, means for selecting from said given number of said stations a respective predetermined number thereof to be fed by said sources mutually exclusively so that only one source can be used at a time to feed any given station, and control means including electrical control means for feeding source material via said conveyor means to said stations in accordance with said selection by said selecting means.
 21. A system as in claim 19 including valve cut-off means for said conveying means whereby material can be conveyed from one of said material sources to one of said stations indicating demand for said material without interference from material being conveyed to another receiving station from another material source.
 22. A system as in claim 19 wherein said selecting means is a stepping switch with a plurality of positions where each position determines the number of said receiving stations fed from each said plurality of material sources.
 23. A system as in claim 19 wherein said plurality of material sources are remotely located from each other and from said receiving stations.
 24. A system as in claim 19 wherein said plurality of material sources are two in number and are remotely located from each other at the end of said vacuum conveying means, whereby a number of stations are fed by one of said sources according to the predetermined selection.
 25. A system as in claim 19 wherein said selecting means includes a plurality of switches associated with each said station which can be fed from more than one of said sources, the positions of said plurality of switches determining the stations fed from each said source.
 26. A system as in claim 25 wherein said plurality of switches are ganged.
 27. A system as in claim 26 wherein said ganged switches are adapted to be manually operated.
 28. A system as in claim 25 wherein said plurality of switches comprises three manually operated switches at least one of which has a position indicating the source which feeds that station.
 29. A system as in claim 28 including at least three sources.
 30. A system as in claim 25 including a number of stepping switches equal to the number of stations which can be fed from more than one of said sources having a plurality of positions which determine the stations fed from each said source.
 31. In a material distributing system, a plurality of material sources, a plurality of receiving stations to be concurrently fed from said sources and having transition valves, at least one of said stations being adapted to change the source which feeds it, means associated with each said source for feeding source material to stations having open transition valves, suction conveying means connecting each of said sources to each of said receiving stations, a level control switch associated with each said station having a demand and a no-demand position, a plurality of switches associated with each said changeable station, each of said switches having a position indicating the source which feeds that station, a valve relay associated with each said station which is adapted to open the transition valve associated with that station, and a master control circuit associated with each said source, said control circuit being adapted to connect to said switches, said control circuit causing said valve relays to sequentially open said transition valves of all said stations to be fed from that source which have a level control switch in a demand position with the result that each said changeable station will be fed by the source indicated by the position of the switches of that changeable station.
 32. A system as in claim 31 wherein said feeding means includes a motor adapted to be energized to cause the feeding of said source material from a given source and a feeder relay circuit adapted to close a switch energizing said motor whenever any of the level control switches of any of the stations fed by the given source are in a demand position.
 33. A system as in claim 32 including purging means associated with each said source comprising a recycle relay circuit which operates to hold all of the transition valves of all of the stations fed from a given source open for a predetermined length of time after all of said stations with a level control switch in a demand position have been fed and to prevent said feeding means from operating during said predetermined length of time.
 34. A system as in claim 33 wherein said plurality of switches are ganged and manually operable.
 35. A system as in claim 33 wherein said plurality of switches comprises three manually operable switches.
 36. A system as in claim 35 including at least three sources.
 37. A system as in claim 33 wherein said plurality of switches are stepping switches, the number of stepping switches being equal to the number of changeable stations and the number of steps in each said stepping switches being equal to the number of desired combinations of stations and sources.
 38. A method for distributing material from a plurality of material sources to a plurality of stations by pneumatic conveying means which connects a given number of said stations to each of said sources, comprising the following steps: selecting from said given nuMber of stations a respective predetermined number thereof to be fed by said sources mutually exclusively so that only one source can be used at a time to feed any given station, and feeding material concurrently from said sources to each of said selected stations so that each said source distributes fibers to only one station at a time in accordance with the previously made selection.
 39. A method as in claim 38 wherein the step of selecting said stations is such that at least one station is selected to be fed from one source and at least one other station is selected to be fed from another source and wherein the said feeding of the selected stations is from the said one and another sources concurrently as aforesaid.
 40. A method for distributing material from a plurality of material sources to a plurality of stations by pneumatic conveying means which connects at least one of said stations to each of said material sources, comprising the steps of: selecting one of said sources as the source of material for said one station, and then sequentially feeding a plurality of said stations, including said one station, from the selected one source.
 41. A method as in claim 40 wherein the said feeding of each of said plurality of stations from said one source is dependent upon the respective demand of the station in question.
 42. A method as in claim 40 wherein the feeding of said plurality of stations from said one source is effected serially in a predetermined order.
 43. A method for distributing material from a plurality of material sources to a plurality of stations by pneumatic conveying means which connects at least one of said stations to each of said material sources, comprising the steps of: selecting one of said sources as the source of material for said one station, and then feeding a plurality of said stations, including said one station, from the selected one source while feeding other stations from another said material source. 